What was the name of Ada Lovelace's mother, a reformer married to Lord Byron?

Ada Lovelace’s mother was Anne Isabella Milbanke, later known as Lady Byron. She married the poet George Gordon Byron, 6th Baron Byron, in January 1815, and their only legitimate child, Augusta Ada Byron, was born that December.

Anne Isabella was well educated and had a serious interest in mathematics. After her marriage broke down, she raised Ada largely apart from Lord Byron, who left England in 1816 and never saw his daughter again. Anne’s influence helped shape Ada’s rigorous education in mathematics, science, languages, and music.

The name can appear in several forms. “Anne Isabella Milbanke” is her birth name; she also became Anne Isabella Noel after inheriting family titles and is widely called Lady Byron. “Annabella” was a familiar form of her name. These variants refer to the same woman, not different candidates.

Ada later became famous for her work with Charles Babbage’s Analytical Engine. Her mother’s effort to encourage logic and mathematics is often contrasted with fears that Ada might inherit her father’s poetic temperament.